涪页HF-1井泵送易钻桥塞分段大型压裂技术

涪页HF-1井是中国石化部署在四川盆地的第1口页岩气水平井，以页岩气勘探有利层系下侏罗统自流井组大安寨段页岩层为目的层，完钻井深3 570 m，垂深2 272.06 m，地温梯度2.50 ℃/100 m。水平段2 433.25~3 570 m，长1 136.75 m，页岩层厚27.23 m。主要为灰黑色页岩、灰质页岩，夹薄层灰色介壳灰岩。?139.7 mm套管完井，采用泵送易钻桥塞分段大型压裂技术分10段进行压裂改造，注入总液量16 098.7 m3，加入支撑剂795.24 t。该井施工由多个专业化施工队伍协同完成，对我国页岩储层改造进行了有益的探索，所取得的经验和教训可供今后国内页岩气水平井分段大型压裂实施参考借鉴。

Large-scale staged fracturing technology with pump-down drillable bridge plug for Well Fuye HF-1

Well Fuye HF-1 is the first horizontal well in shale gas deployed by Sinopec in the Sichuan Basin, for the purpose of favorable shale gas exploration of strata series of the Lower Jurassic artesian well group Da’ an village section shale layers. The well was drilled to TD 3 570 m with vertical depth 2 272.06 m and geothermal gradient of 2.50 ℃ per 100 meters. The length of horizontal section is 1136.75 m drilled from TD2 433.25 to 3 570 m, with shale thickness of 27.23 m. Lithological characters of this well are mainly gray and black shale, calcareous shale, mingles with thin layer of gray shell limestone and limestone. The well is completed by ?139.7 mm casing, and stimulated by using the large scale staged fracturing technique with pump-down drillable bridge plugs in 10 stages, and pumped 795.24 t of proppant with a total fluid volume of 16 098.7 m3. The well operations are completed by a number of professional teams, and are also a useful exploration in the shale reservoirs stimulations in China. The experiences and lessons learned from pilot treatment will be meaningful references on large-scale staged fracturing operations for future shale gas horizontal well in China.